The Siemens 5SY4213-7CC11 is a 2-pole miniature circuit breaker from the SENTRON family, designed with a C tripping characteristic and a 10 kA breaking capacity per EN 60898. It is rated for 400 V AC (440 V multi- or single-phase) and up to 72 V DC, making it a fit for branch-circuit protection in industrial control panels, mechanical engineering, and railway-auxiliary applications.
The 10 kA breaking capacity at 400 V AC (per EN 60898) means this MCB can safely interrupt a fault current up to that level without welding its contacts or cascading failure to upstream gear. That is sufficient for most secondary distribution panels behind a transformer or main breaker — if your available fault current exceeds 10 kA, you need a higher-rated device upstream. The C-curve trips at 5 to 10 times rated current, so it holds through the 3-5x inrush of a small motor or solenoid valve but clears a hard short in under 10 ms. Rated for a -40 °C to 75 °C ambient, this MCB handles unheated enclosures in cold climates and hot cabinet interiors near drives or transformers. The power loss per pole is 1.4 W at rated current in hot operating state — negligible for a single device, but worth summing if you pack 20+ units in a sealed enclosure. The 2 MW width (36 mm) and 70 mm installation depth fit standard DIN-rail distribution boards, and the quick-assembly system with combined top/bottom terminals speeds wiring on repetitive builds.